James nightingale



(No Model.)

J. NIG NGA WOOD BLD 0R PA I I Patentd June 28, 1898.

a P 12,152: %.lwem7 Acent blocks.

UNITED STATES *PATENT OEEIOE.

- JAMES NIGHTINGALE, OE NEW YORK, N. Y;

WOOD BLOCK FOR PAVING.

SPECIFICATION forming part of Letters Patent NO. 606,574, dated June 28, 1898.

Application filed April 6, 1897'. Serial No. 630,998. (No model.)

To @ZZ whom it concern:

Be it known that I, .JAMES NIGH'rINGALE,

a citizen of the United States, residing at NewV the direct keying of each block on the under' or bottom side to the asphaltic or other mixture in which they are laid or bedded to the concrete or other similar foundation, and also yfor the anchoring of the floor directly to the substructure at convenient distances.

In the drawings, Figure l is a perspective view of one of the blocks. Fig. 2 is a plan view of several blocks as placed together. Fig. 3 is a sectional view longitudinally through one block and laterally vof two adja- Fig. 4 is a sectionjshowing an expansion-bolt employed. Fig. 5 is a lateral section of one of the blocks, showing the key for securing theA block to the asphaltic mixture and cement foundation. Fig. 6 is a detail of the key. Y

In carrying out my invention each block is provided with rabbeted sides b, and underneath and completely back of lthese rabbeted side portions are further rabbets h of trian# gular shape in cross-section. At each end the block is provided with a tongue or projection a, narrower in width than the body of the block and-in line with the rabbeted portion of the sides and adapted to engage with the rabbeted portion of the adjacentblock when the blocks are laid end to side, asindicated in Fig. 2. Underneath and back ot the projecting tongues 'a are lthe angular rabbets a', which are also triangular in' cross-section.

Each block, as shown in Fig. 5, is provided with a groove c of dovetail shape on the bottom side running lengthwise, andthis groove receives the head of a7 metallic'key c,the

lower half of said key entering the asphaltic mixture Vwhile in 'a' Vsemitluid state. This asphaltic mixture (shown at'B) sets or hardens around the lower extremity of the key, thereby securely fastening the blocks to the asphaltic mixture, as also to the cement foundation C, upon which the asphaltic mixture is laid.

Y It will readily be Iunderstood that when the projections `or tongues of one block engage under the rabbets in the sides of other blocks they will be tirmly keyed together against independent upward movement. Further, the

triangular rabbets, which extend under and back of the rabbets in the sides and beneath vand back of the tongues at the ends, will form dovetailed channels passing between the blocks and completely encircling each block, and it will be Observed that the dovetailed channels formed between adjoining sides are double the width of the channels between an end and side. The blocks will thus be irmly and securely locked in place by the asphaltic or other suitable mixture entering these dovetailed channels a Z9', as plainly indicated in Fig. 3, and thus the blocks are secured individually by the keys and collectively at the margins bythe mixture entering the grooves. I in'd in practice that it is advisable to secure the liooring-blocks at convenient intervals directly to the concrete or other substructure in addition to the means described, and forlthis purpose use, as shown in Fig. 4, an expansion-bolt D, the head -of which may be countersunk iny the block and the recess above lit filled with a wood plug to correspond with the rest of the wood flooring, and these bolts may be placed at anyV desired portions of the flooring as maybe found most convenient.

Itis Obvious that by the tongueand-shoul der engagement described the several blocks will be supported one by another, so thatsagging, warping, twisting, kand'other unevenness in any part of the tinished'ioor is entirely prevented, that would otherwise occur through disturbance' caused by expansion and contraction and the like.

Having thus described my invention, what Iclaim'isv A wood block for'. floors .havingl rabbeted sides, and angular rabbets underneathand back of thelrabbeted sides, and having also tongues at the ends adapted to be fitted to the rabbeted sides, and having also angular rabbets at the ends underneath and back of the tongues, substantially as described.

In testimony whereof I affix my signature in presence of two Witnesses.

JAMES NIGI-ITINGALE.

IOO 

